3o8 CHASTER AND HEATHCOTE : MOLLUSCA OF OBAN. 



Nucula nucleus, L. Abundant. 



N. sulcata, Brown. [Forbes ; A.M.N.]. A few dredged off 

 Lismore and Maiden Islands. 



* N. nitida, Sow. [A.M.N.]. 



Leda minuta, MiiU. [A.M.N. ; R.D.D. MS.]. Common; 

 with var. brevirostris^ Jeff. 



Astarte sulcata, Da Costa. Abundant throughout the 

 district, and presenting great variation as regards the size, 

 convexity, and sculpture of the shell. The varieties 

 scotica, M. & R., paiicicostata, Jeffreys, and m'lnor, Jeffreys, 

 were taken sparingly with the type. Most of the speci- 

 mens are more or less thickly encrusted with manganous 

 deposit, especially around the margins. 



Astarte compressa, Lin. {A. sulcata \-^x.eUipticd). This was 

 confined to the shallow water in the strait between Fraoich 

 and Kerrera. A few hundred yards away the type is 

 plentiful ; no intermediate forms were taken. We wish to 

 call attention to the important change in the nomenclature 

 given here. Certainly the name compressa is far more 

 appropriately applied to this form than to the next. 



A. montagui, Dillwyn. (^. compressa Mont). [R.D.D.]. A 

 fine specimen of the var. striata, Leach, measuring i8 mm. 

 in length, dredged off Lismore ; valves of the var. globosa, 

 Miill. off Maiden Island. 



A. triangularis, Mont. A few found in the dredgings. 



Kellia suborbicularis, Mont. [A.M.N.]. A large valve 

 dredged off Lismore, and young examples of the var. lactea 

 Brown off Maiden Island. 



** Lasaea rubra, Mont. With the wax. pallida, Jeff., under 

 stones on the shore and in dredgings from shallow water, 



** Montacuta bidentata, Mont. Dredged sparingly. 



** Dec\pu\a.^err\}g\nosB., '^ioni. [A'Tontacutaferriigi?iosa). A 

 few valves dredged. 



J.C, vii., Jan. 1894. 



